var numPrec=3;
function Montre(num) {
  if (num!=numPrec) {
    document.getElementById("Hist"+numPrec).style.visibility="hidden";
    document.getElementById("S"+numPrec).style.top="80px";
    document.getElementById("S"+numPrec).style.color="#F90";
    document.getElementById("S"+numPrec).style.cursor="pointer";
    document.getElementById("Hist"+num).style.visibility="visible";
    document.getElementById("S"+num).style.top="90px";
    document.getElementById("S"+num).style.color="#EEE";
    document.getElementById("S"+num).style.cursor="default";
    numPrec=num; } }